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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.android.inputmethod.latin;
import android.view.MotionEvent;
import android.view.View;
import android.view.Window;
public class ClipTouchEventWindowCallback extends WindowCallbackAdapter {
private final View mDecorView;
private final int mKeyboardBottomRowVerticalCorrection;
public ClipTouchEventWindowCallback(Window window, int keyboardBottomRowVerticalCorrection) {
super(window.getCallback());
mDecorView = window.getDecorView();
mKeyboardBottomRowVerticalCorrection = keyboardBottomRowVerticalCorrection;
}
@Override
public boolean dispatchTouchEvent(MotionEvent me) {
final int height = mDecorView.getHeight();
final MotionEvent event = clipMotionEvent(me, height,
height + mKeyboardBottomRowVerticalCorrection);
return super.dispatchTouchEvent(event);
}
private static MotionEvent clipMotionEvent(MotionEvent me, int minHeight, int maxHeight) {
final int pointerCount = me.getPointerCount();
boolean shouldClip = false;
for (int pointerIndex = 0; pointerIndex < pointerCount; pointerIndex++) {
final float y = me.getY(pointerIndex);
if (y >= minHeight && y < maxHeight) {
shouldClip = true;
break;
}
}
if (!shouldClip)
return me;
if (pointerCount == 1) {
me.setLocation(me.getX(), minHeight - 1);
return me;
}
final int[] pointerIds = new int[pointerCount];
final MotionEvent.PointerCoords[] pointerCoords =
new MotionEvent.PointerCoords[pointerCount];
for (int pointerIndex = 0; pointerIndex < pointerCount; pointerIndex++) {
pointerIds[pointerIndex] = me.getPointerId(pointerIndex);
final MotionEvent.PointerCoords coords = new MotionEvent.PointerCoords();
me.getPointerCoords(pointerIndex, coords);
pointerCoords[pointerIndex] = coords;
if (coords.y >= minHeight && coords.y < maxHeight)
coords.y = minHeight - 1;
}
return MotionEvent.obtain(
me.getDownTime(), me.getEventTime(), me.getAction(), pointerCount, pointerIds,
pointerCoords, me.getMetaState(), me.getXPrecision(), me.getYPrecision(),
me.getDeviceId(), me.getEdgeFlags(), me.getSource(), me.getFlags());
}
}
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